J/AJ/152/31ivo://CDS.VizieR/J/AJ/152/31doi:10.26093/cds/vizier.51520031CDSArias J.I.Walborn N.R.Diaz S.S.Barba R.H.Apellaniz J.M.,Sabin-Sanjulian C.Gamen R.C.Morrell N.I.Sota A.Marco A.,Negueruela I.Leao J.R.S.Herrero A.Alfaro E.J.2017-07-04T13:47:24Z2016-10-21T07:48:35ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmilky-way-galaxyo-starsmorgan-keenan-classificationstellar-spectral-typesline-intensitiesredshiftedOn the basis of the Galactic O Star Spectroscopic Survey (GOSSS), we present a detailed systematic investigation of the O Vz stars. The currently used spectral classification criteria are rediscussed, and the Vz phenomenon is recalibrated through the addition of a quantitative criterion based on the equivalent widths of the HeI{lambda}4471, HeII{lambda}4542, and HeII{lambda}4686 spectral lines. The GOSSS O Vz and O V populations resulting from the newly adopted spectral classification criteria are comparatively analyzed. The locations of the O Vz stars are probed, showing a concentration of the most extreme cases toward the youngest star-forming regions. The occurrence of the Vz spectral peculiarity in a solar-metallicity environment, as predicted by the FASTWIND code, is also investigated, confirming the importance of taking into account several processes for the correct interpretation of the phenomenon.2016AJ....152...31Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/152/31CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/274 : Galactic O-Star Spectroscopic Survey (Sota+, 2014)V/116 : Galactic O star catalog (Maiz-apellaniz+, 2004)J/A+A/564/A39 : VLTS. OVz stars in 30 Dor (Sabin-Sanjulian+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/152/31https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/152/31http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/152/31https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/152/31https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/152/31http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/152/31GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/152/31/table3 (*Double-lined binary Stars in GOSSS)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/152/31/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/152/31/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/152/31/table3?GETtext/xml+votable180.050000true33.12487559.90113890.005555555555555556Cone search capability for table J/AJ/152/31/single (Objects that are single lined in the GOSSS spectra and for which no evidence of binarity is known (table1), and objects that are single lined in the GOSSS spectra but are known to be spectroscopic binaries from high-resolution data (table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/152/31/single?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/152/31/single?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/152/31/single?GETtext/xml+votable180.050000true0.54287567.40894440.0055555555555555566/1287 1299 1335 1781 1953 2409 3011 3037 3300 3301 3307 3312 3337 3600 3606 3649 3653 3722 3724 3755 6891 14237 14253 14255 14263 14295 14353 14355 14359 14624 14633 14641 14646 14647 14658 14688 14689 14690 14692 14693 14698 14716 14740 15369 15478 15626 15670 15682 15683 20849 21504 21511 21635 21647 22022 22211 22240 22243 22249 22258 23637 23645 23774 23962 23982 24179 24390 28809 28819 28890 28891 28892 28913 29115 29116 29118 29119 29162 29463 29489 29504 29513 29517 30246 30627 37212 37333 37334 37342 37750 37841 37861 37870 37897 37900 37915 37923 37924 37926 37928 37938 38016 38018 38022 38024 38026 39804 39930 41595 41676 41680 42171 42213 42303 42376 42390 42417 42438 42456 42458 42462 42481 42513 43034https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/152/31?format=asciiOpticaldefaultJ/AJ/152/31/table3*Double-lined binary Stars in GOSSSSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameObject namemeta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainSpTSpectral typesrc.spTypecharRefReference (G1)meta.ref;pos.framecharW4471a[0.11/0.66]? Equivalent width of HeI 4471 for primary (in {AA})0.1nmspect.line.eqWidthfloatnullableW4471b[0.07/0.42]? Equivalent width of HeI 4471 for secondary (in {AA})0.1nmspect.line.eqWidthfloatnullableW4542a[0.27/0.78]? Equivalent width of HeII 4542 for primary (in {AA})0.1nmspect.line.eqWidthfloatnullableW4542b[0.27/0.45]? Equivalent width of HeII 4542 for secondary (in {AA})0.1nmspect.line.eqWidthfloatnullableW4686a[0.34/0.85]? Equivalent width of HeII 4686 for primary (in {AA})0.1nmspect.line.eqWidthfloatnullableW4686b[0.27/0.38]? Equivalent width of HeII 4686 for secondary (in {AA})0.1nmspect.line.eqWidthfloatnullableZa[0.65/1.26]? Primary metallicity (G2)phys.abund.ZfloatnullableZb[0.75/1.14]? Secondary metallicity (G2)phys.abund.ZfloatnullableGOSNumber of sources in the Galactic O Star (GOS) catalog (Maiz-Apellaniz et al. 2004, Cat. V/116) within 2''meta.ref.urlintnullableGOSSSNumber of sources in the Galactic O-star Spectroscopic Survey (GOSSS; Sota et al. 2014, Cat. III/274) within 1''meta.ref.urlintnullableJ/AJ/152/31/singleObjects that are single lined in the GOSSS spectra and for which no evidence of binarity is known (table1), and objects that are single lined in the GOSSS spectra but are known to be spectroscopic binaries from high-resolution data (table 2)SimbadNameSimbad column added by the CDSmeta.idcharRefReference (G1)meta.ref;pos.framecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBinStar with No evidence of binarity, or spectroscopic binary (SB)src.classcharNameObject namemeta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainSpTSpectral typesrc.spTypecharW4471[0/1.1]? Equivalent width of HeI 4471 (in {AA})0.1nmspect.line.eqWidthfloatnullableW4542[0.4/1.2]? Equivalent width of HeII 4542 (in {AA})0.1nmspect.line.eqWidthfloatnullableW4686[0.4/1.3]? Equivalent width of HeII 4686 (in {AA})0.1nmspect.line.eqWidthfloatnullableZ[0.7/1.5]? Metallicity (G2)phys.abund.ZfloatnullableGOSNumber of sources in the Galactic O Star (GOS) catalog (Maiz-Apellaniz et al. 2004, Cat. V/116) within 2''meta.ref.urlintnullableGOSSSNumber of sources in the Galactic O-star Spectroscopic Survey (GOSSS; Sota et al. 2014, Cat. III/274) within 1''meta.ref.urlintnullable